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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,121 @@ | ||
| /* | ||
| * Copyright 2024 elementary, Inc. (https://elementary.io) | ||
| * SPDX-License-Identifier: GPL-2.0-or-later | ||
| */ | ||
|
|
||
| /** | ||
| * A class for managing the style of the application. This handles switching light and dark mode based | ||
| * based on system preference or application preferene (see {@link color_scheme_override}), etc. | ||
| */ | ||
| public class Granite.StyleManager : Object { | ||
| private static GLib.Once<Granite.StyleManager> instance; | ||
| public static unowned Granite.StyleManager get_instance () { | ||
| return instance.once (() => { | ||
| return new Granite.StyleManager (); | ||
| }); | ||
| } | ||
|
|
||
| /** | ||
| * If this is set to NO_PREFERENCE the systems preferred color scheme will be used. | ||
| * Otherwise the color scheme set here will be used. | ||
| */ | ||
| public Settings.ColorScheme color_scheme_override { get; set; default = NO_PREFERENCE; } | ||
|
|
||
| private StyleManager () { } | ||
|
|
||
| construct { | ||
| unowned var display_manager = Gdk.DisplayManager.@get (); | ||
| display_manager.display_opened.connect (register_display); | ||
|
|
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| foreach (unowned var display in display_manager.list_displays ()) { | ||
| register_display (display); | ||
| } | ||
|
|
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| Granite.Settings.get_default ().notify["prefers-color-scheme"].connect (update_color_scheme); | ||
| update_color_scheme (); | ||
|
|
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| notify["color-scheme-override"].connect (update_color_scheme); | ||
| } | ||
|
|
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| private void register_display (Gdk.Display display) { | ||
| var gtk_settings = Gtk.Settings.get_for_display (display); | ||
| gtk_settings.gtk_application_prefer_dark_theme = prefers_dark (); | ||
| gtk_settings.notify["gtk-application-prefer-dark-theme"].connect (() => { | ||
| set_provider_for_display (display, gtk_settings.gtk_application_prefer_dark_theme); | ||
| }); | ||
|
|
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| set_provider_for_display (display, gtk_settings.gtk_application_prefer_dark_theme); | ||
|
|
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| var icon_theme = Gtk.IconTheme.get_for_display (display); | ||
| icon_theme.add_resource_path ("/io/elementary/granite"); | ||
| } | ||
|
|
||
| private void set_provider_for_display (Gdk.Display display, bool prefer_dark_style) { | ||
| if (app_provider == null) { | ||
| var base_path = Application.get_default ().resource_base_path; | ||
| if (base_path != null) { | ||
| var base_uri = "resource://" + base_path; | ||
| var base_file = File.new_for_uri (base_uri); | ||
|
|
||
| app_provider = init_provider_from_file (base_file.get_child ("Application.css")); | ||
| } | ||
|
|
||
| if (app_provider != null) { | ||
| Gtk.StyleContext.add_provider_for_display (display, app_provider, Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION); | ||
| } | ||
| } | ||
|
|
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| if (prefer_dark_style) { | ||
| if (base_provider != null) { | ||
| Gtk.StyleContext.remove_provider_for_display (display, base_provider); | ||
| } | ||
|
|
||
| if (dark_provider == null) { | ||
| dark_provider = new Gtk.CssProvider (); | ||
| dark_provider.load_from_resource ("/io/elementary/granite/Granite-dark.css"); | ||
| } | ||
|
|
||
| Gtk.StyleContext.add_provider_for_display (display, dark_provider, Gtk.STYLE_PROVIDER_PRIORITY_THEME); | ||
| } else { | ||
| if (dark_provider != null) { | ||
| Gtk.StyleContext.remove_provider_for_display (display, dark_provider); | ||
| } | ||
|
|
||
| if (base_provider == null) { | ||
| base_provider = new Gtk.CssProvider (); | ||
| base_provider.load_from_resource ("/io/elementary/granite/Granite.css"); | ||
| } | ||
|
|
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| Gtk.StyleContext.add_provider_for_display (display, base_provider, Gtk.STYLE_PROVIDER_PRIORITY_THEME); | ||
| } | ||
| } | ||
|
|
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| private Gtk.CssProvider? init_provider_from_file (File file) { | ||
| if (file.query_exists ()) { | ||
| var provider = new Gtk.CssProvider (); | ||
| provider.load_from_file (file); | ||
|
|
||
| return provider; | ||
| } | ||
|
|
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| return null; | ||
| } | ||
|
|
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| private void update_color_scheme () { | ||
| var dark = prefers_dark (); | ||
|
|
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| foreach (var display in Gdk.DisplayManager.@get ().list_displays ()) { | ||
| var gtk_settings = Gtk.Settings.get_for_display (display); | ||
| gtk_settings.gtk_application_prefer_dark_theme = dark; | ||
| } | ||
| } | ||
|
|
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| private bool prefers_dark () { | ||
| if (color_scheme_override == NO_PREFERENCE) { | ||
| var granite_settings = Granite.Settings.get_default (); | ||
| return granite_settings.prefers_color_scheme == DARK; | ||
| } else { | ||
| return color_scheme_override == DARK; | ||
| } | ||
| } | ||
| } |
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